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969cea6836
cgroup v2 is the next generation of the control groups API. This patch replaces the cgroup v1 file systems with the unified cgroup v2 file system. cgroup v2 allows for things like containerd/podman to run rootless containers and opens guix system up to running things like Kubernetes. Thanks to Hilton Chain <hako@ultrarare.space> for suggesting the Docker service change. * gnu/system/file-systems.scm (%control-groups): Change to a single "cgroup2" mount point. * gnu/services/docker.scm (docker-shepherd-service): Trim 'requirement' field accordingly. Co-authored-by: Ludovic Courtès <ludo@gnu.org>
218 lines
9.1 KiB
Scheme
218 lines
9.1 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2018 Danny Milosavljevic <dannym@scratchpost.org>
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;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net>
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;;; Copyright © 2020, 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
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;;; Copyright © 2020 Efraim Flashner <efraim@flashner.co.il>
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;;; Copyright © 2020 Jesse Dowell <jessedowell@gmail.com>
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;;; Copyright © 2021 Brice Waegeneire <brice@waegenei.re>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu services docker)
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#:use-module (gnu services)
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#:use-module (gnu services configuration)
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#:use-module (gnu services base)
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#:use-module (gnu services dbus)
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#:use-module (gnu services shepherd)
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#:use-module (gnu system setuid)
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#:use-module (gnu system shadow)
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#:use-module (gnu packages docker)
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#:use-module (gnu packages linux) ;singularity
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#:use-module (guix records)
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#:use-module (guix gexp)
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#:use-module (guix packages)
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#:export (docker-configuration
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docker-service-type
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singularity-service-type))
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(define-configuration docker-configuration
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(docker
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(file-like docker)
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"Docker daemon package.")
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(docker-cli
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(file-like docker-cli)
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"Docker client package.")
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(containerd
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(file-like containerd)
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"containerd package.")
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(proxy
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(file-like docker-libnetwork-cmd-proxy)
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"The proxy package to support inter-container and outside-container
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loop-back communications.")
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(enable-proxy?
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(boolean #t)
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"Enable or disable the user-land proxy (enabled by default).")
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(debug?
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(boolean #f)
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"Enable or disable debug output.")
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(enable-iptables?
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(boolean #t)
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"Enable addition of iptables rules (enabled by default).")
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(environment-variables
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(list '())
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"Environment variables to set for dockerd")
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(no-serialization))
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(define %docker-accounts
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(list (user-group (name "docker") (system? #t))))
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(define (%containerd-activation config)
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(let ((state-dir "/var/lib/containerd"))
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#~(begin
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(use-modules (guix build utils))
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(mkdir-p #$state-dir))))
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(define (%docker-activation config)
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(%containerd-activation config)
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(let ((state-dir "/var/lib/docker"))
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#~(begin
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(use-modules (guix build utils))
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(mkdir-p #$state-dir))))
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(define (containerd-shepherd-service config)
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(let* ((package (docker-configuration-containerd config))
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(debug? (docker-configuration-debug? config))
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(containerd (docker-configuration-containerd config)))
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(shepherd-service
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(documentation "containerd daemon.")
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(provision '(containerd))
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(start #~(make-forkexec-constructor
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(list (string-append #$package "/bin/containerd")
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#$@(if debug?
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'("--log-level=debug")
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'()))
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;; For finding containerd-shim binary.
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#:environment-variables
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(list (string-append "PATH=" #$containerd "/bin"))
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#:pid-file "/run/containerd/containerd.pid"
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#:pid-file-timeout 300
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#:log-file "/var/log/containerd.log"))
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(stop #~(make-kill-destructor)))))
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(define (docker-shepherd-service config)
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(let* ((docker (docker-configuration-docker config))
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(enable-proxy? (docker-configuration-enable-proxy? config))
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(enable-iptables? (docker-configuration-enable-iptables? config))
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(environment-variables (docker-configuration-environment-variables config))
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(proxy (docker-configuration-proxy config))
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(debug? (docker-configuration-debug? config)))
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(shepherd-service
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(documentation "Docker daemon.")
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(provision '(dockerd))
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(requirement '(containerd
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dbus-system
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elogind
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file-system-/sys/fs/cgroup
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networking
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udev))
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(start #~(make-forkexec-constructor
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(list (string-append #$docker "/bin/dockerd")
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"-p" "/var/run/docker.pid"
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#$@(if debug?
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'("--debug" "--log-level=debug")
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'())
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#$@(if enable-proxy?
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(list "--userland-proxy=true"
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#~(string-append
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"--userland-proxy-path=" #$proxy "/bin/proxy"))
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'("--userland-proxy=false"))
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(if #$enable-iptables?
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"--iptables"
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"--iptables=false")
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"--containerd" "/run/containerd/containerd.sock")
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#:environment-variables
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(list #$@environment-variables)
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#:pid-file "/var/run/docker.pid"
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#:log-file "/var/log/docker.log"))
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(stop #~(make-kill-destructor)))))
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(define docker-service-type
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(service-type (name 'docker)
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(description "Provide capability to run Docker application
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bundles in Docker containers.")
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(extensions
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(list
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;; Make sure the 'docker' command is available.
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(service-extension profile-service-type
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(compose list docker-configuration-docker-cli))
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(service-extension activation-service-type
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%docker-activation)
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(service-extension shepherd-root-service-type
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(lambda (config)
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(list (containerd-shepherd-service config)
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(docker-shepherd-service config))))
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(service-extension account-service-type
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(const %docker-accounts))))
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(default-value (docker-configuration))))
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;;;
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;;; Singularity.
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;;;
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(define %singularity-activation
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(with-imported-modules '((guix build utils))
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#~(begin
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(use-modules (guix build utils))
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(define %mount-directory
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"/var/singularity/mnt/")
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;; Create the directories that Singularity 2.6 expects to find. Make
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;; them #o755 like the 'install-data-hook' rule in 'Makefile.am' of
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;; Singularity 2.6.1.
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(for-each (lambda (directory)
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(let ((directory (string-append %mount-directory
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directory)))
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(mkdir-p directory)
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(chmod directory #o755)))
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'("container" "final" "overlay" "session"))
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(chmod %mount-directory #o755))))
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(define (singularity-setuid-programs singularity)
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"Return the setuid-root programs that SINGULARITY needs."
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(define helpers
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;; The helpers, under a meaningful name.
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(computed-file "singularity-setuid-helpers"
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#~(begin
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(mkdir #$output)
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(for-each (lambda (program)
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(symlink (string-append #$singularity
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"/libexec/singularity"
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"/bin/"
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program "-suid")
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(string-append #$output
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"/singularity-"
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program
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"-helper")))
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'("action" "mount" "start")))))
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(map file-like->setuid-program
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(list (file-append helpers "/singularity-action-helper")
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(file-append helpers "/singularity-mount-helper")
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(file-append helpers "/singularity-start-helper"))))
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(define singularity-service-type
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(service-type (name 'singularity)
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(description
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"Install the Singularity application bundle tool.")
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(extensions
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(list (service-extension setuid-program-service-type
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singularity-setuid-programs)
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(service-extension activation-service-type
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(const %singularity-activation))))
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(default-value singularity)))
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